Re: glibc detected *** groupadd: malloc(): memory corruption

[Mark Hatle <mark.hatle@windriver.com>]

On 6/21/12 10:46 AM, Saul Wold wrote:
> On 06/19/2012 11:07 PM, Robert Yang wrote:
>>
>> Thanks Mark, the rpm.real also has the same problem when the length of
>> tmpdir
>> is 210, it seems that this is because of the glibc.
>>
>>
>> And also other problems found:
>> When use PACKAGE_CLASSES = "package_deb", and the length of tmpdir is 177,
>> the error is:
>>
>> /too/long/path/totmp/sysroots/x86_64-linux/usr/bin/dpkg-scanpackages:
>> bad interpreter: No such file or directory

There is a limit to the length of the interpreter line.  The only solution I 
have ever found for this is to replace explicit interpreter paths with:

#! /usr/bin/env <interpreter>

This does require that the items be in the PATH.

We should scan scripts for that syntax and replace them w/ the /usr/bin/env 
syntax, assuming it will work as expected.

That may still leave issues with other components however.

(and I agree with Saul, 175 characters is unacceptable, it's -very- easy to hit 
that..)

--Mark

>> The interpreter is perl, and it does exist, it seems that we should limit
>> the length of tmpdir to a smaller value then 177 rather than fix these
>> strange
>> problems. I will go on working on it.
>>
> Robert,
>
> A path length of 175 or short is not ideal, we should file bugs against
> these issues.  We should also add the sanity check you suggested as a
> WARNING for lenghts over 175.  That should not be the final solution
> though, we need to address the issues and get them fixed up stream.
>
> The groupadd one sounds like it might be a buffer overflow issue which
> could have larger ramifications
>
> Thanks
>
> Sau!
>
>> // Robert
>>
>> On 06/19/2012 01:47 AM, Mark Hatle wrote:
>>> We're not away of any size limitations within pseudo, other then
>>> PATH_MAX which
>>> is typically 4096...
>>>
>>> --Mark
>>>
>>> On 6/18/12 4:17 AM, Robert Yang wrote:
>>>>
>>>> Hi Experts:
>>>>
>>>> I've met a strange issue, when set the length of builddir to
>>>> 266 (Why I did this is that I need to know how long the tmpdir
>>>> that oe-core can support):
>>>>
>>>> NOTE: package dbus-1.4.20-r3.0: task do_install: Started
>>>> *** glibc detected *** groupadd: malloc(): memory corruption:
>>>> 0x000000000101da70 ***
>>>> *** glibc detected *** groupadd: malloc(): memory corruption:
>>>> 0x000000000101da70 ***
>>>>
>>>> Then the build would hang, this is caused by the command:
>>>>
>>>> PSEUDO_PREFIX=/too/long/path/tmp/sysroots/x86_64-linux/usr
>>>> PSEUDO_LOCALSTATEDIR=... PSEUDO_PASSWD=...
>>>> PSEUDO_NOSYMLINKEXP=1 PSEUDO_DISABLED=0 PSEUDO_LOCALSTATEDIR
>>>> ... /too/long/path/to/tmp/sysroots/x86_64-linux/usr/bin/pseudo
>>>> groupadd --root /too/long/path/to/tmp/sysroots/qemux86 -r netdev -f
>>>>
>>>> 1) I had looked into the code of groupadd, and found that this would
>>>> happen when it used the glibc function which needs malloc(for example,
>>>> the access()), so it seemed this was caused by the glibc or pseudo,
>>>> but I didn't know why it only happened to groupadd/useradd.
>>>>
>>>> 2) I had tried not to use pseudo, it worked well:
>>>>
>>>> sudo groupadd --root /too/long/path/to/tmp/sysroots/qemux86 -r netdev -f
>>>>
>>>>  From this, it seemed that the glibc was ok
>>>>
>>>> 3) I had tried to write a small piece of code which used the
>>>> access(), and
>>>> used pseudo to run it, it worked well:
>>>>
>>>> /too/long/path/for/pseudo/settings/and/then/run/pseudo my_app
>>>>
>>>>  From this, it seemed that both pseudo and glibc were OK.
>>>>
>>>> These 3 steps make me puzzle, maybe we can think that the tmpdir can not
>>>> be too long, and limit it to a proper length, please see this:
>>>>
>>>> http://lists.linuxtogo.org/pipermail/openembedded-core/2012-May/022112.html
>>>>
>>>>
>>>> BTW. the "argument list too long" error has been fixed.
>>>>
>>>> Any suggestion is appreciated.
>>>>
>>>
>>>
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